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The memory management toggle-in passes (see /devices/pdp11/machine/1170/panel/debugger)

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This commit is contained in:
Jeff 2016-11-02 21:20:04 -07:00 • committed by Jeff Parsons
commit 0afab359ad
7 changed files with 222 additions and 178 deletions
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95
devices/pdp11/machine/1170/panel/debugger/README.md
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@ -9,3 +9,98 @@ machines:
---
{% include machine.html id="test1170" %}
Toggle-Ins
----------
From the [PDP-11/70 Maintenance Service Guide](http://archive.pcjs.org/pubs/dec/pdp11/1170/PDP1170_Maintenance_Service_Guide_Apr88.pdf),
Chapter 4:
There are several useful toggle-ins that are probably not very well known. They are as follows:
Memory Management
Use the following toggle-in to verify the correct operation of Memory Management Relocation.
200/012737 MOV #400,@#177572 (load maint. bit in MMRO)
202/000400
204/177572
206/012737 MOV #070707,@#200 (move 070707 to virtual 200)
210/070707
212/000200
214/000000 HLT
300/000300 Preset loc 300 to 300
17772300/077406 Set Kernel I PDR 0 to R/W 4K page
17772340/000001 Set Kernel I PAR 0 to (Base address 100)
Load Address 200
Start Display = 000216 (Halt@214)
Load Address 300
Exam Display = 070707 ... Relocation works
With the PDPjs Debugger, the above "toggle-in" is more easily entered like so:
e 200 012737 000400 177572 012737 070707 000200 000000
e 300 000300
e 17772300 077406
e 17772340 000001
r pc 200
The "g" command should produce these results:
>> e 200 012737 000400 177572 012737 070707 000200 000000
changing 000200 from 00000 to 12737
changing 000202 from 00000 to 00400
changing 000204 from 00000 to 77572
changing 000206 from 00000 to 12737
changing 000210 from 00000 to 70707
changing 000212 from 00000 to 00200
changing 000214 from 00000 to 00000
>> e 300 000300
changing 000300 from 00000 to 00300
>> e 17772300 077406
changing 00017772300 from 00000 to 77406
>> e 17772340 000001
changing 00017772340 from 00000 to 00001
>> r pc 200
updated registers:
R0=000000 R1=000000 R2=000000 R3=000000 R4=000000 R5=000000
SP=000000 PC=000200 PS=000013 SW=00000000 T0 N1 Z0 V1 C1
000200: 012737 000400 177572 MOV #400,@#177572
>> g
running
stopped (3 instructions, 32 cycles, 9 ms, 3556 hz)
R0=000000 R1=000000 R2=000000 R3=000000 R4=000000 R5=000000
SP=000000 PC=000214 PS=000001 SW=00000000 T0 N0 Z0 V0 C1
000214: 000000 HALT
>> dw 300 l1
000300 70707
---
Unibus Map Checkout
Use the following console operating procedure to verify the correct operation of the Unibus Map.
Load Address 500
Deposit 125252 Known Data
Load Address 17000500
Deposit 125252 Data Path Ok
Load Address 17000700
Deposit 070707 Known Data
Load Address 17770202 Map register 0 Hi
Deposit 000000 Relocation constant
Load Address 17770200 Map register 0 Lo
Deposit 000200 Relocation constant
Load Address 17772516 MMR3
Deposit 000040 Enable map
Load address 17000500 Relocates to 700
Examine 070707 ... Relocated ok

55
devices/pdp11/panel/test/README.md
View file

@ -8,58 +8,3 @@ PDP-11 Test Panels
------------------
* [Terminal Test Panel](terminal.xml) (with [Debugger](debugger/terminal.xml))
Toggle-Ins
----------
From the [PDP-11/70 Maintenance Service Guide](http://archive.pcjs.org/pubs/dec/pdp11/1170/PDP1170_Maintenance_Service_Guide_Apr88.pdf),
Chapter 4:
There are several useful toggle-ins that are probably not very well known. They are as follows:
Memory Management
Use the following toggle-in to verify the correct operation of Memory Management Relocation.
200/012737 MOV #400,@#177572 (load maint. bit in MMRO)
202/000400
204/177572
206/012737 MOV #070707,@#200 (move 070707 to virtual 200)
210/070707
212/000200
214/000000 HLT
300/000300 Preset loc 300 to 300
17772300/077406 Set Kernal I PDR 0 to R/W 4K page
17772340/000001 Set Kernal I PAR 0 to (Base address 100)
Load Address 200
Start Display = 000216 (Halt@214)
Load Address 300
Exam Display = 070707 ... Relocation works
Unibus Map Checkout
Use the following console operating procedure to verify the correct operation of the Unibus Map.
Load Address 500
Deposit 125252 Known Data
Load Address 17000500
Deposit 125252 Data Path Ok
Load Address 17000700
Deposit 070707 Known Data
Load Address 17770202 Map register 0 Hi
Deposit 000000 Relocation constant
Load Address 17770200 Map register 0 Lo
Deposit 000200 Relocation constant
Load Address 17772516 MMR3
Deposit 000040 Enable map
Load address 17000500 Relocates to 700
Examine 070707 ... Relocated ok

8
modules/pdp11/lib/bus.js
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@ -93,8 +93,8 @@ function BusPDP11(parmsBus, cpu, dbg)
* For PDPjs machines, the ideal block size is 8Kb (IOPAGE_LENGTH), the size of the IOPAGE on all PDP-11 machines;
* as a result, our IOController functions assume that all incoming offsets are within a single 8Kb block.
*/
this.addrTotal = Math.pow(2, this.nBusWidth);
this.nBusLimit = this.nBusMask = (this.addrTotal - 1) | 0;
this.addrTotal = 1 << this.nBusWidth;
this.nBusLimit = this.nBusMask = (this.addrTotal - 1);
this.nBlockSize = BusPDP11.IOPAGE_LENGTH;
this.nBlockShift = Math.log2(this.nBlockSize); // ES6 ALERT (alternatively: Math.log(this.nBlockSize) / Math.LN2)
this.nBlockLen = this.nBlockSize >> 2;
@ -457,7 +457,9 @@ BusPDP11.prototype.setIOPageRange = function(nRange)
}
if (nRange) {
this.nIOPageRange = nRange;
addr = (1 << nRange) - BusPDP11.IOPAGE_LENGTH;
addr = (1 << nRange);
this.nBusLimit = this.nBusMask = (addr - 1);
addr -= BusPDP11.IOPAGE_LENGTH;
this.prevIOPageBlocks = this.getMemoryBlocks(addr, BusPDP11.IOPAGE_LENGTH);
if (this.realIOPageBlocks) {
this.setMemoryBlocks(addr, BusPDP11.IOPAGE_LENGTH, this.realIOPageBlocks);

14
modules/pdp11/lib/cpustate.js
View file

@ -1312,15 +1312,16 @@ CPUStatePDP11.prototype.mapUnibus = function(addr)
*/
CPUStatePDP11.prototype.mapVirtualToPhysical = function(virtualAddress, accessFlags)
{
var page, pdr, physicalAddress, errorMask = 0;
var page, pdr, physicalAddress;
this.assert(!(virtualAddress & ~0x1ffff) && accessFlags);
/*
* Verify that 1) the incoming virtual address is within the 17-bit I/D range, 2) that
* accessFlags is properly set, and 3) that the MMU is enabled (because non-MMU code paths
* should no longer be going through this function; the Bus component is responsible for
* mapping physical addresses appropriately).
* This can happen when the DSTMODE (MAINT) bit of MMR0 is set but *not* the ENABLED bit.
*/
this.assert(!(virtualAddress & ~0x1ffff) && accessFlags && (accessFlags & this.mmuEnable));
if (!(accessFlags & this.mmuEnable)) {
return virtualAddress;
}
this.mmuLastVirtual = virtualAddress;
@ -1329,6 +1330,7 @@ CPUStatePDP11.prototype.mapVirtualToPhysical = function(virtualAddress, accessFl
pdr = this.mmuPDR[this.mmuMode][page];
physicalAddress = ((this.mmuPAR[this.mmuMode][page] << 6) + (virtualAddress & 0x1fff)) & this.mmuMask;
var errorMask = 0;
switch (pdr & 0x7) {
case 1: // read-only with trap
errorMask = 0x1000; // MMU trap

2
modules/pdp11/lib/defines.js
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@ -316,7 +316,7 @@ var PDP11 = {
PAGE_D: 0x0010, // last fault occurred in D space
PAGE_MODE: 0x0060, // processor mode as of last fault
COMPLETED: 0x0080, // last instruction completed
DSTMODE: 0x0100, // only destination mode references will be relocated (for diagnostic use)
DSTMODE: 0x0100, // only destination mode references will be relocated (aka MAINT bit)
MMU_TRAPS: 0x0200, // enable MMU traps
UNUSED: 0x0C00,
TRAP_MMU: 0x1000, // trap: MMU

132
versions/pdpjs/1.30.2/pdp11-dbg.js
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94
versions/pdpjs/1.30.2/pdp11.js
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